Ah. The Feast of the Rose. That time of the year that gives you the opportunity to get rid of these dashing but annoying duo of devils.
Usually, the Affectionate Devil and the Quiet Deviless (depicted above) lurk around in your Opportunity Deck once you've reached level 15 of the An Intimate of Devils mini quest. And they will stay in your deck until you sold your soul to one of them, because selling your soul sets An Intimate of Devils to 20, making both the Devil card and the Deviless card vanish. But usually, no other action can bring this quality beyond 17.
An Intimate of Devils is quite a funny lil story, but this is annoying. EXCEPT...
With Airs of London lower than 26, you can Dance With Devils at the The Feast of the Rose! opportunity card. And one option there allows you to meet your infernal suitor, when you're lucky raising your An Intimate of Devils quality beyond 17 (as presented above by my other character, who was lucky enough to get there after three years, I think).
It takes an awful lot of time to do so, and it's a terrible source of Masquing. But it's quite a satisfying moment when you hit that level 18. And say Godspeed to this infernally clingy duo.
(Edit, 12.02.2024: I replaced the first picture, 'cause I finally had the two Infernal Nuisances together AND a The Feast of the Rose! opportunity card. Just too lovely a combination to not change this.)